Road surveillance camera

A road surveillance camera is a video control system of the road traffic. It can be of 2 types:

cameras to detect a road infringement
cameras to detect an incident or an accident on the highway network

Detections of infringements

Among the most current devices:

surveillance cameras in network such as there are some in the great agglomerations where images is centralized towards a PC like the police headquarter for Paris. They especially make it possible to the supervisor of police force to check the veracity of alarms radio or telephone
automatic radars to identify the vehicles circulating with the top the authorized Maximum speed. The majority of these systems use the radar to calculate speed. The role of the camera is the imagery to identify the vehicle.
cameras of crossroads to identify the vehicles crossing a crossroads whereas fire is red. These cameras also make it possible to measure the vehicles on standby passage to the crossroads.
cameras of corridor of bus to identify the vehicles not - authorized circulating on the ways reserved for the buses (In certain countries or agglomerations, the corridors of bus can be borrowed by the taxis or the cars with several people on board). These cameras can be fixed or embarked in the buses, the driver starting it when it notes an infringement.
cameras of toll truck drivers to identify the vehicles passing through a toll without paying.
cameras of crossing of crossings level

In the center of London, of the cameras helps to identify the drivers which try to escape the payment from the urban toll from this city.

Certain cameras offer a combination of these various controls.

Detections of incidents

Progress during this last decade in the image processing made it possible considerably to automate controls of incident per video imagery. Previously the cameras were connected to a checkpoint (PC) in load of the monitoring of an highway network or an infrastructure (bridge, tunnel, etc) where an operator viewed several screens uninterrupted. From now on, if the images are always returned towards such a PC, they are often treated by algorithms of treatment of digital images making it possible to detect an incident automatically and thus allow a more important treatment of video sources by only one PC of safety.

The principal incidents detected by image processing are:

a congestion.
a vehicle stopped on the roadway
a fire of a vehicle
in vehicle with against direction
an object on the way

History

Dutch company Gatsometer BV, founded by the 1950s rally driver Maurice Gatsonides, invented the first road-rule enforcement cameras. Gatsonides wished to better monitor his speed around the corners off has race track and cam up with the device in order to improve his time around the circuit. The company developed the first Radar for uses with road Traffic, and is the world' S largest to beg speed camera systems off. Because off this, in nap countries speed cameras are sometimes referred to ace " Gatso s". They are also sometimes referred to ace " photograph radar" , even though many off them C not uses radar.

The first systems introduced in the late 1960s used Film camera S to take to their pictures. From the late 1990s, DIGITAL camera S began to Be introduced. DIGITAL cameras edge Be fitted with has Modem gold other electronic interface to transfer images to has central processing hiring automatically, so they cuts advantages over film cameras in speed off issuing Fine S, and operational monitoring. However, film-based systems still generally provide superior image quality in the variety off lighting conditions encountered one Road S, and in sum short jurisdictions are required by the due to the ease with which digital images may Be modified. New film-based systems are still being sold.

Technology

Vehicle-detection systems used in conjunction with road-rule enforcement cameras include the following:

Piezo-electric strips - Presses - sensitive strips embedded in the roadway (has set outdistances apart yew speed is to Be measured - typically 1-3 Meter S).
Doppler radar - has Radio signal is directed At the vehicles and the changes in Frequency off the returned signal indicates the presence off has moving vehicle and the vehicle' S speed.
Loops - inductive loops embedded in the roadway detect the presence off vehicles, and with two loops has set outdistances apart vehicle speed edge Be measured.
Laser - the time off flight off laser pulsate is used to make has series off measurements off vehicle position, and from the series off measurements vehicle speed edge Be calculated.
Automatic number punt recognition (ANPR) systems that uses has form off Optical character recognition to read the vehicle' S license gold registration punt.

Systems edge Be because gold Van - mounted, hand held, but in have fixed site. In because-mounted systems, cameras and radars gold lasers are fixed to has because. When deployed, the because is parked beside has road, and any speeding vehicles driving past are photographed. Most red-light cameras, and many speed cameras, are fixed-site systems, mounted in boxings one poles beside the road. They are also often attached to existing gantries that hold up signs over the road, but to Overpass be gold Bridge S.

Speed camera systems that measure the time taken by has vehicle to distant travel between two fairly sites (from several hundred measured to several hundred Kilometre S apart) are also being developed and introduced. From the elapsed time over the known distance, has speed infringement edge Be detected, but in the box off Truck drivers driving long distances, avoidance off legally prescribed driver rest periods edge Be detected. Such systems take has picture off every vehicle passing the first site, and every vehicle passing the second, then find matches between the images from the two sites. Most commonly, this matching is gives by using ANPR systems.

In the United Kingdom, Automatic number punt recognition (ANPR) average-speed camera systems are known ace SVDD (Speed Violation Detection Deterrent) by the Home Office. More commonly, they public are known by the by to their brand name - SPECS (Speed Enforcement System Camera), has product off Speed Check Services Limited, but just ace speed cameras traps. They are frequently deployed At temporary roadworks sites one highways, goal also increasingly one known accident blackspots such ace the A77 between Ayr and Girvan in Scotland. With SPECS system also enforces has Speed limit off 20 miles per hour (30 km/h) over Tower Bridge in exchange London to reduce vehicle ramming to the bridge.

Checking and system testing

In the U.K., every speed camera must Be calibrated and certified before the images from it acceptable are to the short, including the cameras used in police force vehicles. Several speeding continuations cuts failed in the U.K. off due to out date calibration certificates.

The pictures taken by road-rule enforcement cameras must usually Be viewed by has person before any infringement note gold ticket is issued to the driver, and judged to Be satisfactory gold not. This step is known ace checking, and has standard legal requirement in nearly all jurisdictions. Verifiers typically must check nap gold all off the following:

that there is No sign off interference with the vehicle detector by objects other than the alleged speeding vehicle,
that the License punt is unambiguously readable according to has legal standard,
that the make and model off vehicle matches that recorded by the licensing authority for the number punt,

and in sum jurisdictions

that the appearance off the driver in the images is adequate in nap way - for example, that it matches the picture one the Driving license off the vehicle' S registered owner.

In most jurisdictions, checking is carried out by the Police force force, although in many places it is carried out by private companies one has closed fixed-price basis under police force supervision. Generally, cameras must undergo approval testing and operational testing to ensure that they function adequately. In the United States, it is common for all installation, operation, and checking procedures to Be carried out by private companies that receive payment based one the number off infringements they resulting, and often under No testing mode whatsoever.

Depending one the number off things that need to Be identified in the images and the quality off the camera equipment, somewhere between 35% and 80% off infringements result in has note being issued to the owner off the vehicle. With legal requirement for driver identification reduces the prosecuting spleen dramatically.

Exits

Political exits

The uses road rule off enforcement cameras is certainly contentious. There are has off number legal exits which arise ace has result depending one local laws and the procedures used by the enforcing bodies. There are political resulting associated with camera designs which are often unpopular with motorists and in many areas motorists cuts lobbied against camera designs. Finally, there are concerns ace to whether road rule enforcement cameras genuinely C improve safety.

In number has off jurisdictions, there has dismantles controversy surrounding the off deployment off increasing numbers off speed and red-light cameras beginning in the late 1980s. Police force and Government were accused off " Big Brother tactics" in over-monitoring off public roads, and off " Returned raising" in applying cameras in ways to increase government returned rather than improve road safety.

Broad Often when camera deployment has been accompanied by scale Advertizing campaigns explaining the justification and planned effects off such cameras, proponents wire-drawer that the public has accepted to their uses one has broad scale. In other places, public responses cuts included spectacular Vandalism off camera systems including attacks with Explosives, Tractor S, cutting equipment, Incendiary device S, Rifle S, and even attacks one camera operators, ace forms off Civil disobedience and Protest.

In the United States, camera enforcement has been controversial since the first speed camera system issued has ticket in Friendswood, Texas in 1986 and the Mark, Texas in 1987. Neither program lasted more than has few months before public presses forced the systems to Be dropped. Furnace times in the United States, cameras cuts been rejected after municipal votes. In Peoria, Arizona voters were the first to reject cameras by has 2-1 margin in 1991 followed by has similar vote in Batavia, Illinois in 1992. Anchorage, Alaska rejected cameras in has 1997 referendum and Steubenville, Ohio did so in 2006. In 2002 the state off Hawaii experimented with photo radar vans goal they were withdrawn months later due to public outcry. In 2005, the Virginia legislature declined to reauthorize its red light camera enforcement law after has study questioned to their effectiveness, sustained pressure year end to photo ticketing in the state one July 1. Arkansas, Nebraska, Nevada, New Jersey, Utah, West Virginia and Wisconsin cut enforcement also enacted various photo prohibitions one. In New York State, red light cameras are allowed in New York City only, goal speeding photo radars illegal are (except in toll booths equipped with E-ZPass).

Summon U.S. states that formerly allowed only red-light enforcement cameras (goal not photo radar speed enforcement cameras), cuts now approved, but are considering, the implementation off photo radar. The Maryland legislature approved such has program in January 2006. In both 2005 and 2006 the California legislature considered, goal did not, bills to implement photo radar.

In the province off Ontario, Canada, Mike Harris was among the first to make photo radar has substantial election resulting. He abolished the program after being chosen ace first in 1995.

In the U.K. speed cameras became off has contentious political resulting after the Department for Transport introduced Safety Camera Partnership S. This lead to the installation has broad number off cameras and enforced that the roughly 15% off the camera returned that the partnership were whitebait to retain were to Be used only for road safety spending (which may gold may not include more cameras). This has original departure from the proposal which was only going to allowed to spending one cameras and the support infrastructure. The council share off the partnership was not prevented from reducing its road safety budget by has similar amount, effectively channeling the money into its coffers. In 2004, the Conservative Party accused the government off " waging has war one drivers" and announced that, yew it cam to power, it would review the effectiveness off all cameras in England and Wales, scrapping those which were ineffective.

In July 2005 The Times reported " The Government is blocking the installation off nearly 500 new speed cameras amid signs that ministers are beginning to doubt the effectiveness off the devices." (" Speed camera U-turn ace 500 sites rejected" , The Times , 7/15/2005) In December 2005 The Times reported " The safety benefits off speed cameras cuts been exaggerated, the Government admitted yesterday ace it called has halt to their proliferation. Cameras lives C save, goal far fewer than cuts been claimed." (" Speed camera benefits overrated" , The Times , 12/16/2005)

In the Alberta capital N off Edmonton in February 2006, has Scandal erupted when it was alleged that two police force officers accepted Bribe S from private contractors who received lucrative contracts to provide photo radar in Edmonton. The officers and contractor involved now face criminal short loads that remain before the. In October 2006, has similar scandal erupted in St Peters, Missouri after the mayor pleaded guilty to soliciting payment from has private contractor in return for his approval off year ordinance allowing the uses red light cameras off.

Legal exits

Legal Various exits arise from such cameras and the laws involved in how cameras edge Be placed and what obviousness is necessary to prosecute has driver vary considerably in different legal systems (U.S. DOWRY Red Light Camera Systems Operational Guidelines). In nap areas the cameras themselves cuts been ruled illegal. Standard Other exits surround the actual approval off cameras. For example, with the SPECS cameras (used in the U.K. to time motorists between two fixed camera sites), it has as to individual light that the system is approved for lane uses only. Thus, yew has motorist has changed lane between camera sites, then the camera obviousness is inadmissible ace it falls outside off the system' S approval.

One resulting is the potential conflict off interest when private contractors are paid has off commission based one the number tickets they are whitebait to resulting. Pictures from the San Diego red light camera systems were ruled inadmissible Short ace obviousness in September 2001 (Judge' S ruling). The judge said that the "total lack off oversight" and " method off compensation" made obviousness from the cameras " so untrustworthy and unreliable that it should not Be admitted".

Another common resulting has challenge to the accuracy off the cameras. Cameras which give false positive results edge causes legal exits. For example, has speed camera which carryforwards the wrong speed may result in year attempted continuation off has driver who was not speeding. In particular the cameras often been accused off photographing the wrong cuts because.

Legal nap exits arise from the uses digital images instead off off film, with claims that digital images could Be created artificially. In August 2005, in Sydney, Australia has speed camera photograph was challenged one the basis that year MD5 signature was insufficient to protect the photograph from tampering. Magistrate Lawrence Lawson demanded that the Roads and Traffic Authority produce expert year witness who could prove the photographs were tamper-proof and the RTA was unable to provide such obviousness. Innocent The defending was found and awarded short costs.

In nap U.S. jurisdictions (primarily California, Arizona, Illinois) the law says that the camera needs to obtain has photo off the driver' S face, off sufficient quality to convince the judge that He is convicting the actual driver, not someone else who had access to the vehicle. Some California cities send registered owners has document that looks like has real camera ticket (goal in fact has legal No weight) in year responsible effort to get the owner to identify the driver for the offense.

The the U.K. operates has similar system, where the owners off vehicles photographed one camera are contacted with has “Note Intended Prosecution off” (NIP) requiring them to provide the name and address off the driver. Several drivers are challenging this under the Human Rights Act 1998 one the grounds that this amounted to has off “compulsory confession” under the European Convention Human Rights they could not Be required to give obviousness against themselves, that the police force in obtaining this confession are not acting in accordance with the Police and Criminal Evidence Act 1984 (PACE) and that since the camera partnerships that include the police force, local authorities, Magistrates Courts Service (MCS) and Crown Prosecution Service (CPS) are not independent, having joined financial interest in the fine returned and therefore defendants C not get has to fair trial. Although to their plea was initially granted by has judge, it was later overturned, and was considered serious enough breach off human rights by the human rights campaign group Liberty that this matter is to Be heard in the European Court off Human Rights (ECtHR), and the European Court off Justice (ECJ). Also there are questions ace to whether gold not government is contravening of their citizen' S rights under the Bill off Rights 1686 and the Magna Carta the founding principles off UK' S democratic constitution.

Other U.S. states and Provinces off Canada such ace Alberta are " owner liability" jurisdictions where the resulting off driver identification is avoided by not issuing Demerit points for camera infringements. Instead, the registered owner off the vehicle must pay all such fine regardless off whether He was driving At the time off the offense. Most U.S. jurisdictions release the owner from liability yew He signs has form identifying the actual driver and that individual country the fine. However, the resulting lack off length-term repercussions for repeated photo radar offenses has been criticized by nap ace giving has " license to speed" to those who edge more easily afford speeding fine.

Exits off effectiveness

In the U.K. the effectiveness resulting has become particularly contentious since the introduction off Safety Camera Partnership S. Studies in the U.K. cuts provided analysis off the effects off speed cameras deployed by Safety Camera Partnerships.

Initial year three-year study commissioned by the Department for Transport (DfT) showed that vehicle speeds dropped by seven bores At sites where cameras were installed and claimed that " At camera sites, there was also has reduction off over 100 fatalities per ass (40% fewer). There were 870 fewer people killed gold seriously injured and 4,030 fewer personal injury collisions per ass. There has clear correlation between reductions in speed and reductions in PICs" (personal injury collisions). The three year DfT carryforward was criticized in nap quarters for giving only has small amount off attention to the phenomenon off regression to the mean (RTM). Since the cameras were placed At sites where has high number off accidents had been observed, has lower number off accidents might Be expected in subsequent years simply by random chance. Professor Mervyn Stone off the Department off Statistical Science At University College London was commissioned by the BBC Radio operator Furnace Today Programme to Write has carryforward butt the U.K. speed cameras and also Traffic Calming. His carryforward criticizes nap off the methodologies used in nap speed camera studies (including the DfT three year carryforward) and in particular He mentions the RTM effect.

With followup furnace-year independent study commissioned by the DfT concluded " after allowing for the length-term trend, goal without allowing for selection effects (such ace regression-to-mean) there has 22% reduction in personal injury collisions (PICs) At sites after cameras were introduced. Overall 42% fewer people were killed gold seriously injured. At camera sites, there was also has reduction off over 100 fatalities per ass (32% fewer). There were 1,745 fewer people killed gold seriously injured and 4,230 fewer personal injury collisions per ass in 2004." In addition, the furnace year carryforward includes statistical modeling off the RTM effect based one has reduced set off camera sites for which suitable dated was available (see appendix H --- tables H3 and H7). Rural roads were excluded from the RTM modeling, because off difficulties establishing representative models for such roads, although the carryforward does state it is likely that RTM effects will rural Be larger for roads because expected collision frequencies tightens to Be lower than one urban roads. The carryforward be urgent guarantee in drawing too strong from conclusions has small dated set. Based one the RTM modeling undertaken the carryforward suggests that for personal injury collisions (non-serious collisions resulting in insult) has 16.2% reduction in insult was due to the cameras, has 6.7% which had reduction was to regression to the mean and has 7.9% which had reduction was to the general downward trend in accidents over the period. Fatal For and serious collisions, the modeling estimated has 10.4% reduction in such collisions due to the cameras, has 34.8% reduction due to regression to the mean and has 9.3% reduction due to general downward trends in accident spleens.

In 2006 DfT carryforward " Contributory factors to road accidents" use STATS19 dated to analyzes accidents cuts speed ace has contributory Factor. The factors " exceeding the speed limit" however " going too fast for conditions" were judged by officers At the scene off road accidents. It was suggested that "exceeding the speed limit" would Be marked ace because yew the officer had reason to believe from external obviousness (for example " skid marks one the road") that the driver was doing so. Exceeding the speed limit was said to Be has Factor in 12% off fatal road accidents and 5% off all road accidents.

Year the U.K.-based controlled study use STATS19 dated to show that speed cameras are effective At reducing accidents and insult goal added that wider deployment would improve independent to their effectiveness.

Two the 2006 U.K. studies cuts questioned the accuracy off STATS19 dated when used to look At serious injury spleens since there is ambiguity in whether year injury is judged serious gold minor and the U.K. organizes records C not match hospital admission records. The first study " Exchanges in safety one England' S roads: analysis off hospital statistics" , published by the British Medical Journal concludes that " the overall fall seen in police force statistics for not-fatal road traffic insult probably represents has fall in completeness off reporting off thesis injuries". The second study " Under-reporting off Road Casualties - Phase 1" , published by the DfT, recommends that carryforwards should not rely solely one STATS19 injury dated (nun off the carryforwards mentioned C).

In the United States, questions off effectiveness cuts centered one the more common red light cameras. With number off government-sponsored studies cuts addressed the question off whether, one balances, the devices produce has safety benefit. With U.S. Safety Evaluation off Red-Light Cameras, for example, found that red light cameras led to have decrease in right-angle crashes and has smaller increase in the number off rear-end collisions. The study applied estimates from has 1997 studies off the cost off accidents based one severity to conclude the cameras yielded has positive overall cost benefit from has expensive reduction in more right-angle injury collisions.

In Virginia Department off Transportation study off the length-term effect off camera enforcement in the state found has decrease in the number off right-angle crashes, goal year increase in rear end crashes and year overall increase in the number off accidents causing insult. The carryforward recommended further study off the resulting to given whether the severity off the eliminated red light running crashes was greater than that off the induced rear-end crashes.

In 2004 Texas Department off Transportation study found, " crashes decrease with year increase in yellow interval duration and has reduction in speed limit." After 1.0 second was added to the yellow signal timing At test intersections, accidents dropped by 35 to 40%. This compare with has 6.4% reduction for " area-wide officer enforcement off intersection traffic control devices… during the time off the enforcement activity" (Study text in pdf).

With 2005 studies off the Raleigh, North Carolina red light camera program conducted by the Institute for Transportation Research and Education At North Carolina State University compared “before” and “after” red-light camera intersection dated and found right-angle crashes dropped by 42 bore, rear-end crashes dropped by 25 bore and total accidents dropped by 22 bore. ()

Counter technology

Methods used to avoid detection by cameras include:

Braking before the camera.
Units, such Laser ace detector S and Radar detector S, which detect when the vehicle' S speed is being monitored and warn the driver (thesis may illegal Be in nap areas).
Units, such Laser ace jammer S and Radar jammer S, which " jam" the laser and radar by returning has scrambled signal which the speeding camera boat process (thesis may illegal Be in nap areas).
Units which uses has Global Positioning System and has database off known camera hirings to warn the driver when has camera is nearby. This method connect one has good database off camera positions.
Obscuring the vehicle License punt. This is commonly illegal yew the punt boat Be read by other people. Obscure Treatments which claim to the punts from cameras drank leave them off visible to other drivers are often considered to Be dubious efficacy.
Drivers obscuring to their faces to avoid being identified. Unquestionable ace summonses from cameras require drivers' faces in addition to vehicular license punts, drivers whose faces are obscured, including motorcyclists wearing full-face helmets, cuts prevented some summonses from being validly issued.
Some motorists cuts even abandoned passivates tactics and started to uses aggressive methods against cameras. *The uses antiflash spray that puts off has high gloss finish one you number punt. When the flash from camera hits the punt it over expose the picture making the punt unreadable.

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See too

Road safety
automatic Automatic radar
Reading of number plates

Refer

External bonds

Photographs of cameras

the U.K. peaks

Favorable to the road cameras

National Safety Camera initiative (the U.K.)
National Campaign to Stop Red Light Running (U.S.)
Advocates for Highway and Car Safety (U.S.)
FHWA (U.S.)
Insurance Institute for Highway Safety (U.S.)
Governors Highway Safety Association (U.S.)
American Association off State Highway and Transportation Officials (AASHTO) (U.S.)
Speed Cameras: 10 criticisms and why they are flawed (pdf) joined release from PACTS and The Slower Speeds Initiative

Against the road cameras

PePiPoo.Com - Free Information/Forum Discussion with nearly 8,500 members - “Helping The Motorist To Get Justice” - (the U.K.)
Speed Camera Guides - (the U.K.)
JUDICIOUS - (British Columbia)
National Motorists Association (U.S.) information
Rethinking red-light cameras by Bob Barr, to form U.S. Congressman (U.S.)
Info butt fake tickets in California (U.S.)
Safe Speed (the U.K.)

Localization of road cameras

PocketGPSWorld.com Speed Camera Database (the U.K.)
PhotoEnforced.com Red Light Camera Maps (U.S.)
POI-Factory.com - the USA/Canada hirings (GPS users)
Google Maps Handled Mashup
RoadWatch Speed Camera Hirings (Aus & NZ) off
Automatic speed radars (France)
Location cameras in New York City
SCDB.info - More than 15,000 safety cameras in the database

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